Forwarding emails

Hi, i have an email address (accounts@local) that i want to forward all emails to this email address to 2 other emails addresses ( info@local and mieke@external ), but also keep the emails in the accounts@local mailbox too. I cant find a way to do it.

I see there is a SEND COPY TO option, but it will only except 1 email address - I did try separating with a space, ";" or "," and i get the error "invalid email address".

There is the FORWARD EMAIL but that doesnt work for me either as it wont let me have an email account and do forwarding on it too. If it try to do it i get the error

I have edited the database by manually adding a forward alias. So i create an email account, and then add an alias for that email account and forward to that email address and all other email addresses i require forwarding to. It seems to work without a problem.

This is very useful if someone is away, they still get to keep the email in their mailbox, plus it is forwarded to anyone who might be covering for them.
I have been doing this for years with postfix and postfix-admin. The user has the ability to set this up within their webmail client.

How can i turn off the ACCOUNT EXISTS check when creating the FORWARD EMAIL. What php file do i need to edit ?

After reading what you pointed to using filter rules ( redirect 'info@example.tld'; keep; ) it can be done that way, but is more complicated and not as easy for a none-tech user to setup.

Could this be added as a feature in a future release, but maybe added as a tab similar to the vacation message ?